I don't want to get into a big fight here about being vegan, it's a personal choice however if everyone went vegan and the animal farmers were to stop producing...where do you think the fertilizer would come from for growing your vegetables? The soil needs to be replenished and if we no longer have cow poop and pig poop and yes smelly ole chicken poop, they will have to rely on one of two things.One chemical fertilizers which I blame for half of our IBS problems or two people poop.Yes there are fields that use human waste on there fields.It's called sludge. If you want to eat organic....organic animal waste is the way to go.
I understand why some people choose not to eat meat. I believe we should all eat some meat.
As for animal agriculture contributing to the green house gas production,the farmers that raise thousands of animals know that that much manure is causing issues and they are now taking steps to correct these problems.There is a farm in the west of Canada that uses all its manure and methane gas to power the farm.They hope to be off the grid soon.
Think of all the things we all do on a daily basis that contributes to our environmental issues. If our farmers could have stayed small and the goverment and the banks hadn't steped in and put the small guys out of business then this huge manure problem wouldn't be such an issue.We would be producing the amount of manure needed for each small peice of land so the farmers would be able to grow your soy beans and make your tofu.
-------------------- IBS-D since 1999...mostly stable..i do cheat too.Bad me.